body{
    margin: 0;
    padding: 0;
}
.title{
    margin-left: 25%;
    width: 50%;
    height: 100px;
    background: none;
    border: none;
    line-height: 100px;
    text-align: center;
    font-size: 3.5em;
    font-weight: bold;
    color: #ffffff;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 100;
}
.backIndex{
    width: 10%;
    height: 100px;
    opacity: 0;
    border: none;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 100;
}
.numshow{
    width: 74%;
    height: 150px;
    line-height: 150px;
    margin: 280px 13%;
    font-size: 8em;
    font-weight: bold;
    background-color: #fff;
    color: #163F6B;
    text-align: center;
    border-radius: 100px;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 100;
    box-shadow: 5px 5px 5px rgba(0, 0, 0, .4) inset;
    -webkit-box-shadow: 5px 5px 5px rgba(0, 0, 0, .4) inset;
    -moz-box-shadow: 5px 5px 5px rgba(0,0,0,.4) inset;
}

.numtitle{
    width: 74%;
    height: 150px;
    line-height: 150px;
    margin: 120px 13%;
    font-size:6em;
    font-weight: bold;
    color: #ffffff;
    text-align: center;
    position: absolute;
    left: 0;
    top: 0;
    text-shadow:0 0 20px #ff0000; color:#fff;
}
#mask{
    font-size:0.5em;
    margin-top: -10px;
}